*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color:transparent;
    /* 点击链接不会出现背景颜色 */
    user-select:none;
    /* 禁止选中文字 */
}
html{
    height:100%
}
body{
    height: 100%;
}
#app{
    height: 100%;
}
li{
   list-style: none; 
}
a{
    text-decoration: none;
   
}
i,em{
    font-style: normal;
}
textarea{
    resize: none;
}
input{
    outline:none;
    -webkit-appearance:none;
    /* 清除ios端的默认外观样式 */
}
.clearfix:after {
    content: '';
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}
img{
    border: 0px;
    vertical-align: middle;
}
button{
    cursor: pointer;
}
input{
    outline: none;
}
textarea{
    resize: none;
}
header,nav,article,section,aside,footer{
    display: block;
}